Cutter adjuster



Feb 79 E95@ E. H. LARKINS 2,496,800

CUTTER ADJUSTER Filed NOV. 5, 1947 BY @n/W ATTORNEYS 3 is withdrawn or lies inwardly from its desired cutting position.

One of my adjusting devices, with the nut 21 screwed down below the position shown in Fig. 2, is applied to the end of the holding cylinder in the position shown at the left in Fig. 1. The plate 25 and lever 32 being thin lie between the end of the body of the cylinder and the frame part I and thus will enter into the space between them. The adjuster is pushed down, springing its arms 22 around the body of the cylinder, until the parts reach the position shown in Fig. 2, with .member for adjusting the support thereon, and

the blade to be adjusted lying opposite the slot or recess 24. Now the exposed or upper armV of` lever 32 is operated to adjust the toe 33 into a position beneath the lower edge of the blade.'l Thereupon, nut 21 is rotated to adjust it up;

wardly upon shaft 26, until the toe engages the edge of the blade, further motion adjusting thelv left-hand end of the blade until it reaches the position shown in Fig. 2, with its cutting edge engaging the stop and gauge surface 24a.

Similar operations are performed at the opposite end of the blade holder with another adjusting device which is right-handed, as compared with the left-handed adjuster utilized at the left-hand end of the holder. Thus the two adjustments of the blade, one at each end thereof, bring its cutting edge into a position where it is uniformly spaced from the central axis of rotation throughout the entire length of the cutter. Thereupon, the clamping bolts I5 are screwed up tightly to secure the blade in place, and the adjusting devices are released by backing ofi their adjusting nuts and pulling them oil from the cylinder.

Similar operations are performed with all cutters, the result being the adjustment or setting of all blades so that their cutting edges are uniformly spaced from the central axis.

f In Figs. 1 and 2 I show two adjusting devices, left-handed and right-handed, for use at opposite ends of the cylinder. Of course, they may be combined as a single instrument, by applying the left-handed operating parts, to wit, plate and lever 32, upon one end face of the body .20 and the corresponding right-handed parts on the ropposite end face of the body. In that case, the left-handed portion of the tool is first used to set the blade at one end, the nearest clamping screw to that end being turned up lightly to temporarily hold that end of the blade in place, and then the same tool is applied to the opposite end of the holder, and the opposite end of the blade is adjusted and set in like manner. Then all clamping screws are screwed up tightly, as before.

All forms of tool described are of simple construction, are easily applied and manipulated, and permit the blades to be accurately set in the desired position. At the same time the tool is of relatively simple construction, can be made and sold at low cost, and is not likely to get out of order or lose its accuracy in service.

What I claim is: v

1. A gauge for setting the blades in the slots of a cylindrical planer blade holder, comprising a.

'a lever formed of thin sheet metal pivotally secured ilat-wise upon said support and adapted Ito be inserted into a position where it is applied latwise to the end of the blade holder, said lever ybeing provided with a toe arranged by pivotal motion of said lever in its own plane to be engaged beneath a blade in said holder, whereby outward adjustment of said support upon said body member advances the blade edge into engagement withthe bottom surface of said gauging recess and thus determines correct cutting positioniof -the blade in the blade holder.

2. 'A gauge for setting the blades in the slots of a cylindrical planer blade holder, comprising a body member provided with opposed resilient arms formed to yieldingly embrace the holder and at one end having a fiat surface lying in a plane perpendicular to the length of the holder when the gauge is applied thereto and between said arms having a gauging recess, a support formed of thin sheet metal having a body portion extending parallel to said plane and slidable f upon said surface and at its outer end being provided with a flange extending over the body member, an adjusting screw extending through said flange and threaded into the body member for adjusting the support thereon, and a lever formed of thin sheet metal pivotally secured flatwise upon said support and adapted to be inserted into a position where it is applied flatwise tothe end of the blade holder, said lever being provided with a toe arranged by pivotal motion of said lever in'its own plane to be engaged beneath a blade in said holder, whereby outward adjustment of said support upon said body member advances the blade edge into engagement with the bottom surface of said gauging recess and thus determines correct cutting position of the blade in the blade holder.

EMIL H. LARKINS.

REFERENCES CITED Theiollowing references are of record in the ille lof this patent:

UNITED STATES PATENTS Number Name Date 186,229 Casterline Jan. 16, 1877 1,668,431 Sprinkle May 1, 1928 1,668,432 f Sprinkle May l, 1928 A FOREIGN PATENTS Number Country Date 546,579 France Aug. 26, 1922 

